Revolving fan.



0. 8. JENNINGS.

REVOLVING FAN. APPLICATION FILED JAN. 6,1915.

1 ,270,833. Patented July 2,1918.

0 plumv INVENTOR o/n er .i Jenn/09.5

ATTORNEY WITNESSES 7 names.

UNITED STATES PATENT OLIVERS. J'ENNIN GS, OF WILKINSBURG, PENNSYLVANIA, ASSIGrNOR TO WESTING HOUSE ELECTRIC AND MANUFAGTURIN G COMPANY, A CORPORATION OF PENN- SYLVANIA.

Specification of Letters Patent.

REVOLVING FAN.

Patented July 2 1918.

Application filed January 6, 1915. Serial No. 790.

To all whom it may concern:

Beit known that I, OLIVER S. JENNINGS, a citizen of the United States, and a resident of Wilkinsburg, in'the county of Allegheny and State of Pennsylvania, have invented a "new. and useful Improvement in Revolving Fans, of whichthe following is a specification.

My invention relates to revolving fans, and' *it has special reference to gyratory electric fans thatare adapted to turn on an 'aXis of rotation while simultaneously and automaticallyturning around an external axis of revolution. I

One object'of my invention is to provide agyratory'fanof simple, compact and durable construction which shall be provided with positively actuated mechanical means for effecting the rotation of the fan support 'by power derived from the rotating shaft that carries the fan blades.

Another object of my invention is to prvide a fan of the above-indicated character which may be readily'adjusted to deliver air, either horizontally or at various angles of inclination, without disengaging the gearing which causes the revolution of the fan structure.

In the accompanying drawings, Figure 1 is a side view, partially in elevation and partially in section, of a fan structure constructed in accordance with my invention, and Fig. 2 is a plan view, with parts emitted, of the train of gearing which transmits power to revolve'the fan structure.

The structure shown in the drawings embodies two fan motors 1 and 2 that are ivotally secured to a bracket member 3 w ich "is rotatablysuspended from a hanger rod 4. The hanger 4 may be surrounded by the usual ornamental tube. 5 and to its screwthreaded lower end 6 is attached a stationary supporting structure which comprises an upper member 7, to which is attached, by means of screws 8, a horizontal plate 9. A lower member 10, which also forms a part of the stationary supporting structure, is connected to the plate 9 by means of a rod 11 provided with screw threaded ends 12 and 13'that engage correspondingly screwthreaded openings in the plate 9 and the member 10, res iectively. To the plate 9 is rigidl secured an annular downwardlyexten ing member 14 to which is ri idly secured, by means of rivets 15, a toothed, hol

tude that, when the low track 16, of generally frusto-conical shape, having concave sides. The curvature of the sides of the track is of such magniarts of the structure are assembled, all points on the outer surface of the track are equidistant from the axes of the pivots on which themotorsll and 2 are supported. One of thesejp'iv'ots is indicated at 17. The tra'ck 16 .is provided with perforations 18 which extend lengththe teeth of the annular track which, it will be observed, remains stationary during the operation of the device. 1 i

The bracket 3 is rotatably mounted on the stationary supporting structure bymeans of a sleeve 19 formed integral with, or rigidly attached to, the bracket 3 and adapted to surround the rod 11.' Ball bearings 20 are disposed in suitable ballraces between the sleeve 19 and the rod 11. l The fan motors 1 and 2 may beof any usual construction, and are provided with sets of fan blades at the outer ends of their respective armature shafts 26 and 27. To the inner end bell of each of themotors is secured a gear box 28 whichcontains the mechanism for rotating the hraeket'3, which will nowv be described. I A worm 29 is axially secured tothe' armature shaft 26 of the fan motor 1 in any convenient manner, as by meansof'coopen ating clutch teeth 30' and 31 formed on the armature shaft 26 and the worm 29, respectively. The worm 29meshes with a worm wheel 32 that is mounted on the upper end of a short vertical shaft 33,to "the lower end of which is secured a pinion 3 that meshes with a spur gear wheel '35. 'The gear wheel 35 is supported on a short shaft 36 which carries also a larger spur gear wheel 37 that is adapted to mesh with the perforations 18 in the stationary trackfl16. The spur gear wheel 37 may, if desired, be replaced by a pin gear wheel. It will be observed that the rapid rotation of the armature shaft 26 is transmitted, through the train of reduction gearing just described, to the gear wheel 37 which engages the stationary track 16 and travels around it. Since the bracket 3 is rigidly secured to the fan motors, the bracket and all of the parts associated with it are likewise revolved.

The inclination of the fan motors may be variedin any suitable maner, and such variation in the tilt of the fans will not afiect the meshing of the gear-wheel 37 with .itheQtiltff-ofthe jfans -may' conveniently :be ef- I rial No. 791,

thetraclrlfi, inasmuch as the sides of the track'are curved upon a radiusv equal to the distanceof the track from the aXes of the pivots of the fan motors. This variation in fected bythelinkage mechanism shown and described; 1n my oopending' application Se- I filed January 6, 1915, and as- Westinghouse Electric and Manu- "'iible tilted positions; The linkage for efiectingkthe reciprocation of the member 40 is controlled by means of agwing nut 41 asso- V ciatedwiththe rotatingbracket 3.2 I

Tl1'e' electrical: connections for" energizing the' fanfmotors' may be of anysuitable and V usualconstruction and are'ftherefore not described in detail. [The motors may be starta ed andstopped by means of a switch ,42 con-;

trolled by a depending-chain or cord l8.

The gear wheel 87 ,iowhich' engages the stationary metal; track 16, may suitably be made of rawhide, bakelite or someother substance which will mesh with the track without un- 7 due noise.

4 1 Either "one or both'of the-fan motorsmay be provided with gearing, such as that described for effecting revolution'of the fan bracket, andi numerou s other structural modifications. may be e'ffected inthe apparatus shown and, described without departing from the spirit of my invention; Itis there fore to' be'understood that 'my invention comprehends all such modifications as fall 'Withinthescope' of the rappended claims." V

I claim as" my invention:- 7

45' said support,,a stationary annular track havm'g' a, concave exteriorsurface symm'etg i 1; The "combination withf I -port,tof 'almotor .pivotallyfmounted on the "rieally curvcl witli respect to. the pivotal V1 ,su ppora.

axis of the said motor anddisposed adj acent' tolthe saidsup'port,anda gearvvheel adapttau) be'driven by'the. said m'otor and mesh 'jg'withthesai'd track for rotating the said f-2.FThe combination with a'i-ota tabh support, of a motor pivotally mounted on the 'Copie' s of. this patent maybe obtained; for five cents each,' byiaddressing their Commissioner of fatents, washinston'mtzq I concentric a rotatable sup} i said support, a stationary'annular'track of generally frusto-conical shape having a coni cave exterior surface V curved in crossg section and; disposed adjat p driven by the said motor and meshingwith the said track for rotatingthe 7 cent to the said support, and a zgearwheel adapted tobe said-support.

that [is circularly 3. The combination with "a rotatablebsupf;

port, of a motor pivotally mounted "on'the' said support, a stationary annulartrack having a' regularly curved exterior surface,

and a gear wheel meshing with the said "track and: adapted to berrdriven by thefsaid 1 motor and" to be pivotally. moved therewith,;

thesaid track and the gear-wheel'being v 1 adapted to mesh in-a' pluralityof epositions of the said motor and of thesaidgear wheel; I V 'withfa rotatable supqf port, of a motor pivotally mounted upon:the 'ls' said support, a stationary track disposed I adjacent to the said supportandhavingfa f curved exterior surface, a gear 'WllGBlitCltLPb-f 'f ed 'to'be driven by the saidmotor and mesh ving with the said track for rotatingthe'said i "1 support, and means-foradjustingthe said' ji j motor around a pivot that islmaintained with the center of curvature of k the surface of the said 3 a 5; In a mechanismlof the class described, a supporting pedestal, a.-'frame Zmount'ed 1 thereon for-rotation thereabout, a fan-act u ,4. The combination ating motor adjustablysupported on thepro-p' tatable frame so that theinclination of the fans axis may be varied, a shaft .a'ctuated by and adjustable with the fan" motor, and V a transmisslon mechanism supportedon the I 1 frame and embodying'means havingj ntermeshing engagement with portions ':on the tion of the motor in difi'erent angular positions of the frame with-respect,tothe p-cde subscribed "my; this 3 0thffday of Dec;

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